Ikumyon

I've translated the file into Japanese.

I'm not sure how to do a pull request, so I uploaded it to the cloud. https://mobidrive.com/sharelink/z/7PnjFqxjdVX1gHgXcl57He25UkBPNBtedOiyjyqKFTr6

That's why it didn't switch well when I switched languages, thank you for fixing that.